CVE-2023-0331 in Correos Oficial Plugin
Summary
by MITRE • 02/27/2023
The Correos Oficial WordPress plugin through 1.2.0.2 does not have an authorization check user input validation when generating a file path, allowing unauthenticated attackers to download arbitrary files from the server.
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Analysis
by VulDB Data Team • 03/10/2025
The vulnerability identified as CVE-2023-0331 affects the Correos Oficial WordPress plugin version 1.2.0.2 and earlier, representing a critical security flaw that undermines the plugin's authorization mechanisms. This issue stems from the plugin's failure to implement proper user input validation when processing file path generation requests, creating a pathway for unauthenticated attackers to exploit the system. The flaw exists within the plugin's core functionality that handles file operations, where insufficient validation allows malicious actors to manipulate input parameters and access files that should otherwise be restricted.
The technical implementation of this vulnerability demonstrates a classic lack of input sanitization and access control enforcement. When the plugin processes requests for file generation or retrieval, it accepts user-supplied parameters without adequate validation or authentication checks. This weakness creates a path traversal condition where attackers can manipulate file path parameters to navigate the filesystem and access sensitive files that are not intended for public access. The vulnerability operates at the application layer and represents a direct violation of secure coding principles, specifically addressing CWE-22 - Improper Limitation of a Pathname to a Restricted Directory.
From an operational perspective, this vulnerability presents significant risks to WordPress installations using the affected plugin. Attackers can leverage this flaw to download configuration files, database credentials, wp-config.php files, and potentially other sensitive data stored on the server. The unauthenticated nature of the exploit means that any user with access to the WordPress site can potentially exploit this vulnerability without requiring valid credentials. This creates a substantial attack surface that could lead to complete system compromise, data exfiltration, and further lateral movement within the network infrastructure.
The impact of this vulnerability extends beyond immediate data exposure to encompass broader security implications for the affected WordPress environment. Organizations using the Correos Oficial plugin may find their systems compromised through this vector, potentially leading to unauthorized access to sensitive information, modification of critical system files, or even complete system takeover. The vulnerability's classification under ATT&CK technique T1078 - Valid Accounts and T1566 - Phishing demonstrates how such flaws can serve as entry points for more sophisticated attacks, as attackers can use the initial access gained through this vulnerability to establish persistence and escalate privileges.
Mitigation strategies for CVE-2023-0331 should focus on immediate remediation through plugin updates to versions that address the authorization and input validation issues. System administrators should also implement network-level restrictions and access controls to limit exposure, particularly by blocking direct access to plugin directories and implementing proper file permissions. Additionally, organizations should conduct comprehensive security audits of their WordPress installations to identify other potential vulnerabilities and ensure that all plugins are running current, secure versions. The vulnerability highlights the importance of proper input validation and authorization checks as fundamental security practices that should be implemented at every layer of application development, aligning with industry standards such as those outlined in the OWASP Top Ten and NIST cybersecurity guidelines.